initial_conditions:oceanic []

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==== Shared in EC-Earth consortium ====

Details are here https://dev.ec-earth.org/projects/ecearth3/wiki/Ocean_initial_conditions_for_climate_predictions

==== Brief description ====

Please note that Ec-Earth2 includes NEMO2.2 and Ec-Earth3 includes NEMO3.3

^ ID^ OCEAN MODEL^ GRID^ FIRST^ LAST^ INTERVAL (MONTH)^ MEMBERS^ Comments^ References |
| s4| NEMO3.6 | ORCA1L46| 19600101| 20160701| all months | fc0 - f4| ocean reanalysis - mask corrected for ORCA1 - vertically interpolated and extrapolated for ORCA1L75| Mogensen et al(2011), Balmaseda et al (2012) |
| s4| NEMO2.2 / NEMO3.2 / NEMO3.3| ORCA1 and ORCAL46| 19580101| 20141201| 02, 05, 08, 11| fc0 - f4| ocean reanalysis - mask corrected for ORCA1 - vertically interpolated and extrapolated for ORCA1L46 and ORCA1L75| Mogensen et al(2011), Balmaseda et al (2012) |
| GLORYS2V1| NEMO3.3| ORCA1L46| 19921101| 20091101| 05,11| fc0| Interpolated initial conditions from an ocean reanalysis| Ferry et al (2010) |
| GLORYS2V1| NEMO3.3| ORCA025L46| 19921101| 20091101| 05,11| fc0| Interpolated initial conditions from an ocean reanalysis| Ferry et al (2010) |
| GLORYS2V1| NEMO3.3| ORCA025L75| 19921101| 20091101| 05,11| fc0| ocean reanalysis| Ferry et al (2010) |
| GLOSEA5| NEMO3.3| ORCA025L75| 19930430| 20131031 | 05,11| fc0| ocean reanalysis, extrapolated horizontally to match the mask of the NEMO version we use | Mogensen et al (2009) | 
| GLOSEA5| NEMO3.3| ORCA1L46| 19930430| 20131031 | 05,11| fc0| Interpolated initial conditions from an ocean reanalysis| Mogensen et al (2009) | 
| ORAP5| NEMO3.3| ORCA025L75| 19790430| 20131031 | 05,11| fc0| ocean reanalysis| Hao et al (2015) | 
| ORAP5| NEMO3.3| ORCA1L46| 19790430| 20131031 | 05,11| fc0| Interpolated initial conditions from an ocean reanalysis| Hao et al (2015) | 
| m01x| NEMO3.3| ORCA1L46| 19921101| 20091101| 02,05,08,11| fc0| Initial conditions produced by nudging the ocean component in EC-Earth3.0.1 toward the monthly T and S from GLORYS2V1 ocean reanalysis| no reference yet |
| m01w| NEMO3.3| ORCA025L46| 19921101| 20091101| 02,05,08,11| fc0| Initial conditions produced by nudging the ocean component in EC-Earth3.0.1 toward the monthly T and S from GLORYS2V1 ocean reanalysis| no reference yet |
| m01u| NEMO3.3| ORCA025L75| 19921101| 20091101| 02,05,08,11| fc0| Initial conditions produced by nudging the ocean component in EC-Earth3.0.1 toward the monthly T and S from GLORYS2V1 ocean reanalysis| no reference yet |
| official_repro| NEMO3.6| ORCA01L75| 19500101 | 19500101 | --- | fc00-fc04| Initial conditions for the official EC-Earth reproducibility test| https://github.com/plesager/ece3-postproc#reproducibility-test |
| a1e1/a1ue| NEMO3.6| ORCA1| 19600101| 20151201 | all |fc00-fc04|5-category sea ice product using DFS5.2 surface forcing fields, surface restoring and subsurface nudging to ORAS4 with EC-Earth3.2 (NEMO-LIM only sims). Member fc00 should be taken from a1ue and members fc01 to fc04 should be taken from a1e1. For 2015 only member fc00 is available, so use a22b instead for 2015. | no reference |
| a1n1| NEMO3.6| ORCA025| 19600101| 20151201 | all |fc04-fc00|5-category sea ice product using DFS5.2 surface forcing fields, surface restoring and subsurface nudging to ORAS5 with EC-Earth3.2 (NEMO-LIM only sims). | In progress |
| a22b| NEMO3.6| ORCA1| 20100101| 20181201 | all |fc00-fc04|5-category sea ice product using ERA-Interim surface forcing fields, surface restoring and subsurface nudging to ORAS4 with EC-Earth3.2 (NEMO-LIM only sims). | no reference |
| a2fd| NEMO3.6| ORCA1| 20180101| 20191201 | all |fc01-fc05|5-category sea ice product using ERA5 surface forcing fields, surface restoring and subsurface nudging to ORAS5 with EC-Earth3.2 (NEMO-LIM only sims). | no reference |



==== Need for new ocean initial conditions ====

These are ranked by priority :

1) ORAS4 ORCA1L75 configuration for 1958 to present

2) GLORYS2v1 ORCA1L75 configuration for 1993 to 2009

3) ORAS4 all configurations whole period

4) GLORYS2V3 all configurations whole period

==== References ====


Balmaseda M.A., Mogensen K.S., Weaver A.T., 2012, Evaluation of the ECMWF Ocean Reanalysis ORAS4. Quart J Roy Meteor Soc DOI 10.1002/qj.2063.

Ferry N et al., 2010, Mercator global eddy permitting ocean reanalysis GLORYS1v1: description and results. Mercator Ocean Quart. Newsl, 36, 15-27. 

Mogensen K.S., Balmaseda M.A., Weaver A., 2011, The NEMOVAR ocean data assimilation as implemented in the ECMWF ocean analysis for system 4. ECMWF Technical Memorandum, 668.

Mogensen K.S., Balmaseda M.A., Weaver A., Martin M.J., Vidard A., 2009, NEMOVAR: A variational data assimilation system for the NEMO ocean model. ECMWF newsletter.

Hao Z., Balmaseda M. A., Mogensen K., 2015, The new eddy-permitting ORAP5 ocean reanalysis: description, evaluation and uncertainties in climate signals. Climate Dynamics (2015): 1-21.
==== How_to_generate_new_ocean_initial_conditions ====

== ORAS4, ORCA1L42 and ORCA1L75 == 

1. Update the ecaccess-certificate-create tool, which gives 7 days of access to ECMWF repositories. 

2. clone the project https://earth.bsc.es/gitlab/ec-earthCPWG/Oce_IC.git

3. run  export PYTHONPATH=$PYTHONPATH:$path_to_the_Oce_IC

4. go into the path_to_the_Oce_IC and run fetch_ORAS4.sh after filling the start dates you want to download from EMCWF and interpolate.

== ORAP5, ORCA025L75 == 

1. Update the ecaccess-certificate-create tool, which gives 7 days of access to ECMWF repositories. 

2. git clone https://earth.bsc.es/gitlab/es/cpg_tools.git -b develop-eleftheria 

2. Fetch the data locally (for example when in fat nodes) 

  cd cpg_tools/prep_restarts/generate_restarts_orap5_HR
  sbatch dl_restarts.sh
  
3. Copy the data using the correct naming, in the repository of the initial conditions.    
            
- Pay attention that for initial conditions for 1st May and 1st November we use the **closest available dates** in the original data, which **are not always the same for each year**.       

- Also, we check the size in the original data, because some dates **have half size**, which means that they do not have all the variables we need for interpolation. For example, the restart of 19930430 is not suitable for using as initial condition:

  ll /esnas/reconstructions/ecmwf/orap5/restarts/1993/*199304*
  
  -rw-r--r-- 1 pbretonn Earth 9184196770 Oct  7 04:31 /esnas/reconstructions/ecmwf/orap5/restarts/1993/g0tx_19930401_00021960_restart.tar.gz
  -rw-r--r-- 1 pbretonn Earth 9181022277 Oct  7 04:54 /esnas/reconstructions/ecmwf/orap5/restarts/1993/g0tx_19930406_00022320_restart.tar.gz
  -rw-r--r-- 1 pbretonn Earth 9183757715 Oct  7 05:17 /esnas/reconstructions/ecmwf/orap5/restarts/1993/g0tx_19930411_00022680_restart.tar.gz
  -rw-r--r-- 1 pbretonn Earth 9181268805 Oct  7 05:45 /esnas/reconstructions/ecmwf/orap5/restarts/1993/g0tx_19930416_00023040_restart.tar.gz
  -rw-r--r-- 1 pbretonn Earth 9178049931 Oct  7 06:13 /esnas/reconstructions/ecmwf/orap5/restarts/1993/g0tx_19930421_00023400_restart.tar.gz
  -rw-r--r-- 1 pbretonn Earth 9179559914 Oct  7 06:35 /esnas/reconstructions/ecmwf/orap5/restarts/1993/g0tx_19930426_00023760_restart.tar.gz
  -rw-r--r-- 1 pbretonn Earth 4927336766 Oct  7 06:50 /esnas/reconstructions/ecmwf/orap5/restarts/1993/g0tx_19930430_00024048_restart.tar.gz

After the manual checking, we run the following script:  
  cd cpg_tools/prep_restarts/generate_restarts_orap5_HR
  sbatch copy_orap5.sh
  
  
 
== ORAP5, ORCA1L46 == 

We use a software called **SOSIE** [[http://sosie.sourceforge.net/]] to interpolate the data. We do the following steps (on fat nodes):

  cd cpg_tools/prep_restarts/generate_restarts_orap5_LR
  sbatch launchscript.sh 

 
== GLOSEA5, ORCA025L75 == 

We need to extrapolate the files to the mask we use locally. We do the following separately per year (here as example for 19940501, in the fat nodes)

   cd cpg_tools/prep_restarts/generate_restarts_gs5_HR/19940501
   sbatch 19940501.sh 

== GLOSEA5, ORCA1L46 == 

Similarly, as in ORAP5 ORCA1L46, we need to interpolate by using a software called **SOSIE** [[http://sosie.sourceforge.net/]] to interpolate the data. We do the following steps on the fat nodes: 

   sbatch launchscript.sh
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